Question

rounds off 396 to the nearest hundred. also, find the hcf of 396 and the new number.

Answer 1

round off to nearest hundred: 400
so numbers are 400 and 396.
prime factors of 400
$= 2 \times 2 \times 2 \times 2 \times 5 \times 5 \\ 396 = 2 \times 2 \times 3 \times 3 \times 11 \\ hcf = 2 \times 2 = 4$

Answer 2

400 is the rounded number and hcf of 396 and 400 is
396 = 2×2×3×3×11×1
400 = 2×2×2×2×5×5×1
hcf = 2×2×1 = 4