Question

Section - C.
14. Estimate 796+998 using general rule.
15. Find the value of the following by using suitable property,
297 x 95 + 297 x 5
16. Find the H.C.F of 18, 54 7 and 81.
17. Using divisibility test determine 573243 is divisible by 11. question 16 and 17​

Answer 1

Answer:

Q15) 297×95+297×5

Answer-first we have to take 297 as common

= 297×(95+5)

=297×100

=29700

Q17) 573243(divisible by 11 or not)

Answer- First Step

let us add the no. in odd place= 5+3+4=12

let us add the no. in even place=7+2+3=12

then we subtract the sum to check wheather it is divisible by 11 or not=12-12=0

So it is divisible by 11