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Mental Maths 1 1. What must be added to thirty-seven to make fifty? 2. What number is half of forty-four? 3. Write out the number thirty thousand in figures. 4. Multiply 5.6 by ten. 5. Write out the biggest integer you can by using the digits 3, 7, 6, 0, 4. 6. What is 200 multiplied 100? 7. A regular pentagon has sides of seven centimetres. What is its perimeter? 8. 1000 subtract 647. 9. What number is 99 more than 324? 10. Mary is running around a 400 metre track. She stops for a rest after 250 metres. How much further has she got to run? 11. What is 6 times four times three? 12. Clare has a £5 note. She buys a magazine for £2.40. How much change will she receive? 13. Write a quarter of a metre in millimetres. 14. How many days in 6 weeks? 15. 1000 subtract 650. 16. How much money is a quarter of £5? 17. Four children share some sweets. They have 3 sweets each and there are three left over. How many stamps were there altogether? 18. Add 2250 to 4506. 19. How many £5 notes in £250. 20. 36 + 26 + 32 =. Mental Maths 2 1. 56 divided by 8. 2. 69 + 84. 3. 4004 – 3769. 4. 70 x 30. 5. 6² 6. Write 10004 in words. 7. Write all the factors of 24. 8. 50% 0f 30 9. Take 300m from 6km. 10. 78 + = 164 11. Approximately, what is 48 X 68 12. Find the average (mean) of 36 and 94. 13. 80 x 52 = 4160. What is 80 x 26? 14. Take 14 from 9 plus 7. 15. Eleven fives. 16. 800 x 40. 17. One tenth of 1 kilogram. 18. What fraction of £5 pound is 50p? 19. 72 divided by 9. 20. Write ½ a litre in millilitres Mental Maths 3 1. How many hours in 4 days? 2. 75 percent of 40. 3. Take £14.56 from £20. 4. Divide 87 by 10. 5. 68 taken from a number leaves 57. What is the number? 6. Caernarfon to Chester is 78 miles. How far is it there and back/ 7. How long is it from 5:47 a.m. to 9:20 a.m.? 8. Roughly, what is 42 x 58. 9. Mother is 32cm short of 2 metres. How tall is she/ 10. Add 400ml to three-quarters of a litre. 11. How many 250g pots of paste can be filled from a 10 kg container? 12. Write 4 hundredths as a decimal. 13. What is the perimeter of a square with sides 4cm long? 14. What is the area of a 16cm by 20cm rectangle? 15. A number divided by 6 gives 42. What is the number? 16. 500 times 50. 17. 137 – 62. 18. 10% of 1kilometre. 19. Write 35 600 in words. 20. Divide 23 by 100. Mental Maths 4 1. Share 42 equally between 6. 2. Find the mean average of, 13, 17, 27. 3. 25% of 80. 4. Take 13.34 metres from 20 metres. 5. 15 x 16 = 240. What is 15 x 17? 6. Write all the factors of 13. 7. ¾ of 28. 8. Take 12 grams from 1 kilometre. 9. What must you divided 400 by to get 19? 10. Twice a number is 18 less than 64. What is the number? 11. What is the volume of a 6cm by 5cm by 8cm cuboid? 12. How many bags of 25 carrots can be filled from a sack of 903? 13. How many pencils costing 19p each can you buy for £5? 14. What number taken from 67 leaves 23? 15. Approximately, what is 396 divided by 51? 16. Twelve biros at 37p. 17. ¾ of 2000. 18. How many minutes in 9 hours? 19. How many vertices has a cuboid? 20. The perimeter of a square is 14 metres. What is the area? Mental Maths 5 1. 15 x 3 2. 0.3 x 10 3. 60 + 29 4. 49 divided by 7 5. What number multiplied by 11 gives 121? 6. 80 – 27 7. What is the difference between 47 and 200? 8. The ghost train ride costs £2.80. How much for four rides? 9. Divide 4000 by 20. 10. Is 2367 an odd number? 11. A dog and a cat together weigh 18kg. The dog weighs twice as much as the cat. How much does the cat weigh? 12. Roughly, what is 29 x 11? 13. 47 x 10 14. 14 + 9 + 5 = 15. Increase 14 by 17 16. 72 – 25. 17. + 47 = 100 18. How many 20p coins in £7? 19. 5 x 25. 20. The perimeter of a square is 20cm. How long is one side? Mental Maths 6 1. How many degrees anti-clockwise is it from west to south-east? 2. One tenth of 34000. 3. Take 3.4 divided from 6.2. 4. The rent of a caravan is £49 per week. Approximately how much is that a year? 5. How much change from £2 for three choc bars at 39p each? 6. About how tall is a street lamppost: 3m, 9m, or 15m? 7. How many pairs is 64 shoes? 8. How many edges has a cube? 9. Subtract 0.43 from 0.85. 10. 2.7 + 6.9. 11. One fifth of 30000. 12. How many inches in 2 yards? 13. Approximately, what is 57 x 72? 14. 310 X 5. 15. What is 50 millilitres in litres? 16. Rachel’s father gave her 1/10 of his lottery winnings. How much did she get? 17. The sum of 58 + 43. 18. 0.005 x 100. 19. How many ounces in 4lb? 20. 68 less than 120. Mental Maths 7 1. How many 50 seater buses are needed to carry 858 people? 2. 20% of 20 litres. 3. Approximately, what is 13 x 490? 4. 5 + 6 + 9 + 7 =. 5. A train travels at 50 mph. How long will it take to go 275 miles? 6. The square root of 625. 7. Which of these numbers are prime: 23, 24, 25, 26, 27, 28? 8. How many faces on a triangular prism? 9. 0.72 x 100. 10. What is 1.03kg in grams? 11. Five cubed. 12. 4260 – 70. 13. Decrease 47 by 21. 14. 25% of 12 grams. 15. Is 27 degrees C a hot or cold day? 16. Half of 126. 17. How many degrees is a clockwise turn from west to north-east? 18. A number less than 82 divides exactly by 8, but leaves a remainder of 2. What is that number? 19. Write in figures 1 million and 100. 20. Which is warmer: -9ºC or -2ºC? Mental Maths 8 1. What is the value of the digit 6 in the number 5692/ 2. A carpet salesman drives 36000 miles a year. What is his monthly average mileage? 3. Which weighs less, a 1lb parcel or a 1kg parcel? 4. What is the total of 62 and 12? 5. How many lines of symmetry does a square have? 6. Divide 7.50m by 2. 7. How many hours in 4 days? 8. Put these temperatures in order, starting with the coldest. 5ºC, 3ºC, -7ºC, -12ºC. 9. How many degrees in a triangle? 10. What is the total of £3.12 and £1.75 11. A piece of string 6.4m long is cut into 8 equal pieces. How long is each piece? 12. What are the total number of days in January, February and March? 13. Multiply £1.65 by 4. 14. Reduce 3 000 000 by 400 000. 15. 56 x 1000. 16. How many degrees are equal to two right angles/ 17. What is the size of each angle on an equilateral triangle? 18. If 9 jam tarts cost £4.14. How much will 1 cost? 19. What is the total of 0.72m, 1.45m and 1.62m? 20. Add £3.20, £2.50 and £1.95. Mental Maths 9 1. Find the mean of 3, 4, 5, 6. 2. If 9 batteries cost £7.20, how much will 10 batteries cost? 3. There are 1000 pens. Nine-tenths are black and the rest are blue. How many of each colour are there? 4. Does three multiplied by 21 make 63/ 5. In Rugby, one player scores 32 points and another player scores 26 points. What is the average score? 6. How many are 2 dozen? 7. Henry believes that 12 times 12 is 136. Is he right? 8. Multiply £23.45 by 100. 9. Write one and four tenths as a decimal. 10. Ceri was born in 1984. How old is she now? 11. 7.7 x 10. 12. What is 1/3 of £60? 13. £4.62 + £3.78. 14. Divide 24.4 by 10. 15. How many flat surfaces does a cylinder have? 16. One-seventh of a number is 8. What is the number? 17. –6 + 10. 18. A number multiplied by 35 is 700. What is the number? 19. Half of 468. 20. How many triangular faces does a square based pyramid have? Mental Maths 10 1. 4² 2. 927 divided by 9 3. (43 + 34) ÷ 8 4. 60 x 29 5. 17.6 – 3.32 6. 25% of £185. 7. What is the difference in temperature between 17ºC and -8ºC? 8. In 17 hours a car travels 544 miles. What is the average speed? 9. How many prime numbers between 50 and 60? 10. A meal for 4 people cost £13.80. What was the average cost? 11. What must you multiply 13 by to make 169? 12. (8-3) x (13 – 4). 13. Subtract 10 from 564. 14. 4.6 x 1000. 15. £6.98 + £3.56 16. Find the change from £30 for £13.65? 17. Find the average 45 and 125? 18. Which is the closest to 4 litres: 4 pints, 7 pints, 15 pints or 17 pints 19. How many rows of 25 chairs are needed to seat 420 people? 20. What is the next three numbers, 2, 4, 8, 16, ……

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posted: | 10/1/2012 |

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