If 3 * 7 = 58; 5 * 6 = 61; 3 * 2 = 13 then 5 * 4 = ?

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Solution

The correct option is B 41
The rule is: a∗b=a2+b2
3∗7=33+72=9+49=58 etc
∴5∗4=52+42=25+16=41

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Similar questions

Q. If

3 + 2 = 7, 4 + 3 = 10, 5 + 4 = 13

, then

6 + 5 = ?

Verify the following :

(i) $\frac{3}{7} \times (\frac{5}{6} + \frac{12}{13}) = (\frac{3}{7} \times \frac{5}{6}) + (\frac{3}{7} \times \frac{12}{13})$
(ii) $\frac{- 15}{4} \times (\frac{3}{7} + \frac{- 12}{5}) = (\frac{- 15}{4} \times \frac{3}{7}) + (\frac{- 15}{4} \times \frac{- 12}{5})$
(iii) $(\frac{- 8}{3} + \frac{- 13}{12}) \times \frac{5}{6} = (\frac{- 8}{3} \times \frac{5}{6}) + (\frac{- 13}{12} \times \frac{5}{6})$
(iv) $\frac{- 16}{7} \times (\frac{- 8}{9} + \frac{- 7}{6}) = (\frac{- 16}{7} \times \frac{- 8}{9}) + (\frac{- 16}{7} \times \frac{- 7}{6})$

Q. If 7 * 3 = 52; 9 * 5 = 86; 3 * 4 = 13 then 5 * 7 = ?

Explain why $7 \times 11 \times 13 + 13$ & $7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 + 5$ are composite numbers ?

Q. If

7 * 3 = 52; 9 * 5 = 86; 3 * 4 = 13

, then

5 * 7

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If 3 * 7 = 58; 5 * 6 = 61; 3 * 2 = 13 then 5 * 4 = ?

The correct option is B 41The rule is: a∗b=a2+b2a∗b=a2+b23∗7=33+72=9+49=583∗7=33+72=9+49=58 etc∴5∗4=52+42=25+16=41

The correct option is B 41
The rule is: a∗b=a2+b2
3∗7=33+72=9+49=58 etc
∴5∗4=52+42=25+16=41