12.The rational number that does not have a reciprocal is a) 0 b) 1 c) -1 d) 1/2
13. The factorisation of (l + m)2 – 4lm is
a) (l – m)2 b) (l + m – 2)2 c) (l + m + 2)2 d) (l + m) 2
14. (2° + 4-1) × 22 is equal to
a) 21 b) 3 c) 4 d) 5
160 – 165 5
15. In which of the following trapeziums will the angles marked x and y DEFINITELY be equal
13. The factorisation of (l + m)2 – 4lm is
a) (l – m)2 b) (l + m – 2)2 c) (l + m + 2)2 d) (l + m) 2
14. (2° + 4-1) × 22 is equal to
a) 21 b) 3 c) 4 d) 5
160 – 165 5
15. In which of the following trapeziums will the angles marked x and y DEFINITELY be equal
Answers & Comments
Answer:
12). b - 1
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