## Topics |
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1. 15 × 3 .

2. One quarter of 48 .

One quarter of 48 can be written as ** ^{1}/_{4}** × 48 =

3.

Let x be the required number .

24 + x = 100

24 + x - 24 = 100 - 24 (subtracting both sides by 24 )

4. 10 % Rs 80.

10 % Rs 80 = ** ^{10}/_{100}** × 80

= 8

5. 0.2 × 10 .

2 × 10 = 20

Since there is one decimal place in 0.2,put a decimal point one place from left of 20 .

0.2 × 10 = 2.0

= 2 .

6. 50 + 39 .

7. Is 29 a prime number ?

Yes 29 is a prime number because the factors of 29 are 1 and 29 itself .

8. 42 ÷ 7 .

6 × 7 = 42

42 ÷ 7 = 6 .

9. 80 - 27 .

10. Approximately , what is 39 × 11 ?

10 is nearer to 11 .

So 39 × 10 = 390

Therefore 39 × 11 is approximately equal to 400 .

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Cambridge Secondary Grade 5

IGCSE

## Practice in Related Chapters |

H.C.F AND L.C.M |

Pattern |

Numbers |

Numbers in Operations |

Test of Divisibility |

Powers of numbers |

Prime And Composite Numbers |

Fractions |