If average of 7 consecutive numbers is 21, then find the difference between the smallest and the largest number.
Answer & explanation
Correct answer: option 4
Seven consecutive numbers are :
18 19 20 21 22 23 24
(Average)
ATQ, 24 - 18 = 6
*Note: In case of consecutive numbers, Difference b/w largest and smallest no. = (Total no. - 1)