Find out which number stands for AB in the following operation:
A B
+7 2
9 6

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Solution

The correct option is D 24
A 2-digit number when added to 72 gives 96. That means 24 is the number that is added to 72. Thus AB=24.

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Similar questions

b = \frac{1}{2} a b

Let $*$ be a binary operation on the set Q of rational number as follows:
$(i) a * b = a - b$

$(i i) a * b = a^{2} + b^{2}$

$(i i i) a * b = a + a b$

$(i v) a * b = (a - b)^{2}$

$(v) a * b = \frac{a b}{4}$

$(v i) a * b = a b^{2}$
Find which of the binary operation are commutative and which are associative?

Q^{+}

*

a * b = \frac{a b}{2}

a, b \in Q^{+}

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