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Solving Unknowns

Which of the ...

Question

Which of the following is different from the others?

A

20 + (-25)

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B

(-37) - (-32)

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C

(-5)

(-1)

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D

(-45)

(-9)

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Solution

The correct option is A 20 + (-25)
Option A: 20 + (-25) = - 5
Option B: (-37) - (-32) = -37 + 32 = 5
Option C: (-5) $\times$ (-1) = 5
Option D: (- 45) $\div$ (-9) = 5
Except option A, all other have positive 5 as result.

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Question 22

Which of the following is different from the others?

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(b) $(- 37) - (- 32)$
(c) $(- 5) \times (- 1)$
(d) $45 \div (- 9)$

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37, 31, 42, 43, 46, 25, 39, 45, 32

Q. 1, 5, 9, 15, 25, 37, 49

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$\frac{2}{5} \times \frac{- 3}{7} - \frac{1}{6} \times \frac{3}{2} + \frac{1}{14} \times \frac{2}{5}$

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(i). $\frac{2}{5} (\frac{1}{9} + \frac{2}{5})$ (ii). $\frac{5}{12} (\frac{25}{9} + \frac{32}{5})$ (iii). $\frac{8}{9} (\frac{11}{2} + \frac{2}{9})$

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