Question 43

If 1&7 = 80, 4&5 = 90 and 6&8 = 140, then ﬁnd the value of 5&5 = ?

Solution

Given : 1&7 = 80, 4&5 = 90 and 6&8 = 140

If we replace '&' with '+', and multiply the sum by 10, we get the desired result.

Eg :- $$(1+7)\times10=80$$

and $$(4+5)\times10=90$$ and $$(6+8)\times10=140$$

Similarly, $$(5+5)\times10=100$$

=> Ans - (B)

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