Mental maths and investigations

1 marksCore skill

What is 751 subtract 99?
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1 marksCore skill

What is 3 cubed?
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1 marksCore skill

Divide 9.2 by 100.
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1 marksCore skill

Add 98 to 331.
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1 marksCore skill

What is half of 37?
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1 marksCore skill

Multiply 4.3 by 100.
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1 marksCore skill

What is 14 squared?
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1 marksCore skill

What is 16 times 9?
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1 marksCore skill

Add 101 to 755.
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1 marksCore skill

Work out 7+7×97 + 7 \times 9.
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1 marksCore skill

What is 869 subtract 99?
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1 marksCore skill

What is double 54?
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1 marksCore skill

What is 41 times 9?
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1 marksCore skill

Work out 4+5×44 + 5 \times 4.
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1 marksCore skill

What is the largest number that divides exactly into both 12 and 16?
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1 marksCore skill

Round 6.253 to 1 decimal place.
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1 marksCore skill

What is the mean of 20, 11 and 14?
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1 marksCore skill

Work out 0.2 times 0.4.
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1 marksCore skill

What is 10% of 240?
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1 marksCore skill

Round 3.259 to 1 decimal place.
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1 marksCore skill

Write 2128\frac{21}{28} in its simplest form.
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1 marksCore skill

What is the mean of 8, 4 and 12?
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1 marksCore skill

What is 12.5% of 40?
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1 marksCore skill

Add 34\frac{3}{4} and 18\frac{1}{8}. Give your answer as a fraction.
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1 marksCore skill

Take 1.39 from 4.
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1 marksCore skill

What is 78\frac{7}{8} of 120?
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1 marksCore skill

Add 12\frac{1}{2} and 13\frac{1}{3}. Give your answer as a fraction.
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1 marksCore skill

Take 2.27 from 11.
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1 marksCore skill

Share 40 in the ratio 2 : 3. What is the larger share?
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1 marksCore skill

A rectangle is 11 cm by 3 cm. What is its area, in cm²?
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1 marksCore skill

If 2x+6=302x + 6 = 30, what is xx?
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1 marksCore skill

A fair dice is rolled. What is the probability of an even number? Give your answer as a fraction.
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1 marksCore skill

A rectangle is 5 cm by 8 cm. What is its area, in cm²?
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1 marksCore skill

Share 48 in the ratio 3 : 5. What is the larger share?
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1 marksCore skill

How many minutes are there in 2.25 hours?
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1 marksCore skill

Two angles of a triangle are 36∘36^\circ and 64∘64^\circ. What is the third angle, in degrees?
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1 marksCore skill

I pay for a £3.35 item with a £10 note. How much change do I get, in pounds?
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1 marksCore skill

How many minutes are there in 2.75 hours?
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1 marksCore skill

Two angles of a triangle are 68∘68^\circ and 51∘51^\circ. What is the third angle, in degrees?
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1 marksCore skill

How many millilitres are there in 4.5 litres?
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Independent practice for ISEB Common Entrance 13+ Mathematics. Not endorsed by ISEB or by any school.

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