Question 40

If 19!3 = 32, 13!4 = 18 and 12!2 = 20, then find the value of 17!3 = ?

Solution

Given : 19!3 = 32, 13!4 = 18 and 12!2 = 20

If we replace '!' with '-', and multiply the difference by 2, we get the desired result.

Eg :- $$(19-3)\times2=31$$

and $$(13-4)\times2=18$$ and $$(12-2)\times2=20$$

Similarly, $$(17-3)\times2=28$$

=> Ans - (B)

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