1) The set of counting numbers "C" is = a) {1,2,3,4,5} b) {0,1,2,3,4,....} c) {1,2,3,4,....} d) {1,3,5,7,....} 2) The set of natural numbers "N" is = a) E ∩ O b) {1,2,3,4,.....} c) {0} ∪ C d) {0,1,2,3,4,5.6,....} 3) {2,3,14} ∩ {11,14,27} .......... N a) ⊂ b) ∈ c) ∉ d) ⊄ 4) {6.7,8} .......... N a) ⊂ b) ∈ c) ∉ d) ⊄ 5) 16/4 .......... N a) ⊂ b) ∈ c) ∉ d) ⊄ 6) The number of student in the class .......... N a) ⊂ b) ∈ c) ∉ d) ⊄ 7) ∅ .......... N a) ⊂ b) ∈ c) ∉ d) ⊄ 8) N ∩ O = ...... a) E b) N c) O d) ∅ 9) E ∩ p = ...... a) {2} b) p c) E d) ∅ 10) o − N = ...... a) N b) O c) E d) ∅ 11) N ∩ {2,6,34,78} = ...... a) N b) C c) {2,6,34,78} d) ∅ 12) p − N a) N b) p c) E d) ∅ 13) N − E a) N b) O c) E d) ∅ 14) (2.64 x 100) ......... N a) ⊂ b) ∈ c) ∉ d) ⊄

the set of natural numbers

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