RRB RPF RPSF SI and CONS Model Papers 7 with solutions

Question : 36 of 120

Marks: +1, -0

ARITHMETIC

Find the least square number which is exactly divisible by 4, 9 and 14.

Solution:

(2) LCM of 4, 9 and 14 :
4 = 2 × 2
9 = 3 × 3
14 = 2 × 7
∴ LCM = 2 × 2 × 3 × 3 × 7 = 2

^{2}

× 3

^{2}

× 7
∴ Required number = 2

^{2}

× 3

^{2}

× 7

^{2}

= 1764

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