Question

The difference between the greatest and smallest numbers which when rounded off a number to the nearest tens as 540, is
(a) 10
(b) 9
(c) 8
(d) 10

Answer 1

(b) 9
544 is the greatest number that when rounded off to the nearest tens will become 540.
535 is the least number that when rounded off to the nearest tens will become 540.
∴ Difference: 544 − 535 = 9