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If 324 xx 150 = 54, 251 xx 402 = 48 and ...

If 324 xx 150 = 54, 251 xx 402 = 48 and 523 xx 246 = 120,then 651 xx 345 = ?

A

120

B

85

C

144

D

60

Text Solution

Verified by Experts

The correct Answer is:
C
First of all, add the digits of each number and thenmultiply them.
`rArr (3 + 2 + 4) xx(1 + 5 + 0)`
or, `9 xx 6 = 54`
`rArr (2 + 5 + 1) xx (4 + 0 + 2)`
or, `8 xx 5 = 48`
`rArr ( 5 + 2 + 3) xx (2 + 4 + 6)`
or, `10 xx 12 = 120`
Therefore,
`rArr (6 + 5 + 1) xx (3 + 4 + 5)`
or, `12 xx 12 = 144`
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