NCTB Class 6 Math Chapter One Exercise 1.6 Solution by Math Expert. Bangladesh Board Class 6 Math Solution Chapter 1 Natural Numbers and Fractions Exercise 1.6 Solution.

Board |
NCTB |

Class |
6 |

Subject |
Mathematics |

Chapter |
1 |

Chapter Name |
Natural Numbers and Fractions |

Exercise |
1.6 Solution |

__Exercise:- 1.6__

**(1) How many prime numbers are there from 28 to 40?**

Solution:- (a) 3.

29, 31, 37

**(2) Which one of the following are co-prime pairs?**

Solution:- (b) 19,18

**(3) What is the H.C.F of 12,18 and 48?**

**(4) In the mathematical sentence 0.01×0.002— =0.000000006, which number should be in the —-?**

**(6) In one digits are used in enumeration?**

Solution:- In one digit natural number – (a) (i) & (ii).

**(7) The number 6435 is divisible by**

Solution:- The number 6435 is divisible by (d) i, ii, iii.

**(8) What is the multiple of the greatest number in the picture?**

Solution:- The greatest number is – (d) 32

**(9) What is the highest common factor of the tow numbers in the picture?**

Solution:- The highest common factor is – (a) 8

**(10) Into how many rectangles is the square divided?**

Solution:- The square id divided into (d) 24 rectangles.

**(11) How much part of the square is every rectangle?**

**(17) Toma had TK.50. She gave her younger brother TK. 15.50 and her friend TK. 12.75. What amount of money was left with her?**

Solution:- The money now left with her

= TK. 50-(TK. 15.50+TK. 12.75)

= TK.50-TK.28.75

= TK. 21.75 Answer.

**(18) Parul Begum has 100 hundredths of land. She cultivated rice in 40.5 hundredths of it. Capsicum in 20-2 hundredths and potato in 10-75 hundredths. The rest of the part is used for the cultivation of brinjal. How much part of the land was the for cultivation of brinjal?**

Solution:- = 100 – (40.5+20.2+10.75) hundredths

= (100-71.45) hundredths

= 28.55 hundredths. Answer

**(19) 1 inch = 2.54cm. Then, 8.5 inch = ……cm?**

Solution:- 1 inch = 2.54cm.

Then 8.5 inch = (8.5×2.54)cm

= 21.59cm Answer.