Quiz-1

Given,

X + Y = 2Z ----(i)

Z + W = 2X----(ii)

using (i) and (ii) we get : X + Y + Z + W = 2Z + 2X
=> Y + W = X + Z

Clearly 7- 2 + 5 X 7 = 40

On interchanging + and x and 5and 6 in (3),

we get the equation as

6 x 5 + 20 = 50, which is true

A means ‘plus’

B means ‘minus’

C means ‘divided by\'

D means ‘multiplied by’

18+12/6*2-5

=18+2*2-5

=18+4-5

=18-1

=17

4 + [–1(–2 – 1)]²

= 4 + [–1(–3)]²

= 4 + [3]²

= 4 + 9

= 13

4 – 3[4 –2(6 – 3)] ÷ 2

4 – 3[4 – 2(3)] ÷ 2

4 – 3[4 – 6] ÷ 2

4 – 3[–2] ÷ 2

4 + 6 ÷ 2

4 + 3

7

16 – 3(8 – 3)² ÷ 5

16 – 3(5)² ÷ 5

16 – 3(25) ÷ 5

16 – 75 ÷ 5

16 – 15

1

–{2x – [3 – (4 – 3x)] + 6x}

–1{2x – 1[3 – 1(4 – 3x)] + 6x}

–1{2x – 1[3 – 4 + 3x] + 6x}

–1{2x – 1[– 1 + 3x] + 6x}

–1{2x + 1 – 3x + 6x}

–1{2x + 6x – 3x + 1}

–1{5x + 1}

–5x – 1

16 ÷ 2[8 – 3(4 – 2)] + 1

16 ÷ 2[8 – 3(2)] + 1

16 ÷ 2[8 – 6] + 1

16 ÷ 2[2] + 1 (**)

16 ÷ 4 + 1

4 + 1

5

Step 1:    9 - 5 ÷ (8 - 3) x 2 + 6 = 9 - 5 ÷ 5 x 2 + 6           Parentheses

Step 2:  9 - 5 ÷ 5 x 2 + 6 = 9 - 1 x 2 + 6                              Division

Step 3:  9 - 1 x 2 + 6 = 9 - 2 + 6                                           Multiplication

Step 4:  9 - 2 + 6 = 7 + 6                                                        Subtraction

Step 5:  7 + 6 = 13                                                                   Addition