Question 25

Find the missing number from the below options.

Solution

9 = $$3^{2}$$ 25=$$5^{2}$$ 49= $$7^{2}$$

6 = 3 $$\times$$ 2 11 = 5 $$\times$$ 2 + 1 13 = 7 $$\times$$ 2 -1

9 = 3 $$\times$$ 3 16 = 5 $$\times$$ 3 + 1 20 = 7 $$\times$$ 3 -1

So, the answer would be option b) 20.

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