1) How much is 24×24? a) 575 b) 547 c) 576 2) Decompose the number 30 into the product of prime numbers: a) 2×15 b) 3×10 c) 2×3×5 3) Write the crowd of the word ,,school": a) M={s,c,h,o,o,l} b) M={s,c,h,o,l} c) M={s,c,h,l} 4) What does the crowd empty? a) Element 0 b) No element c) 2 elements

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