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Numbers Worksheet-17

Numbers Worksheet-17

 

  1. Temperature at the foot of a moun­tain is +5°C. It fell down by 10°C at the top of the mountain. The tem­perature recorded on the top is

(a) +15°C           (b) –15°C           (c) + 5°C            (d) –5°C

 

  1. The value of (–2)7 is

(a) +64               (b) –64               (c) –128             (d) –14

 

  1. Value of (62)2 is

(a) 124                (b) –124             (c) 3244             (d) 3844

 

  1. Value of 24 × (–2)2 × 42 × (–5)2 is

(a) –144             (b) –5760          (c) +5760          (d) +57,600

 

  1. Cube of (–3) is

(a) +27               (b) –9                 (c) –6                 (d) –27

 

  1. Cube of is

(a) –125             (b)             (c)               (d)

 

  1. Fourth power of (–2) is

(a) –16               (b) –8                 (c) +8                 (d) +16

 

  1. Square of any –ve integer is

(a) negative       (b) positive        (c) 0                    (d) none

 

  1. (–1)11 value is

(a) +1                  (b) 0                    (c) –1                  (d) none

 

  1. Simplified value of is

(a)               (b)             (c)            (d)

 

  1. 100 – 4 [25 – {5 + 12 – 9}]

(a) –32               (b) +132             (c) + 32              (d) –132

 

  1. [( –2)4 – (11 – 1)] / 3

(a) 1                     (b) 2                    (c) –2                 (d) 6

 

  1. –8 – 2 [6 + 4 {7 – (2.8 + 1.4)}]

(a) –34.4           (b) –42.4           (c) +42.4           (d) –34.4

 

  1. Smallest negative number

(a) –1                                               (b) –10

(c) 0                                                 (d) does not exist

 

  1. Biggest positive number

(a) –1                                               (b) +1

(c) 0                                                 (d) does not exist

 

  1. Parenthesis type of brackets are denoted by

(a) [ ]                  (b) { }                  (c) ( )                  (d) [ ]

 

  1. Expanded form of (–ab)4 is

(a) (–ab) × (–ab) × (–ab) × (–ab)

(b) 4 × (–ab)

(c) (–ab) × (–ab)

(d) (–ab) × (–ab) × (–ab)

 

  1. Exponential form of (–3) × (–3) × (–3) is

(a) –33               (b) (–3)3            (c) 33                   (d) (3)3

 

  1. Identity element w.r.t. subtraction in integers is

(a) 0                                                (b) 1

(c) –1                                              (d) does not exist

 

  1. The statement which holds correct is

(a) N ⊂ W ⊂ I                                (b) I ⊂ N ⊂ W

(c) N ⊂ N ⊂ I                                 (d) I ⊂ W ⊂ N

 

Answer Key:

(1)-(d); (2)-(c); (3)-(d); (4)-(d); (5)-(d); (6)-(d); (7)-(d); (8)-(b); (9)-(c); (10)-(d); (11)-(c); (12)-(b); (13)-(b); (14)-(d); (15)-(d); (16)-(c); (17)-(a); (18)-(b); (19)-(d); (20)-(a)