Question

No SIM 10:52 PM 67%! X photo 1.PNG RNATIONAL SINGAPORE MATHS COMP 14. A, B and C are non-zero whole numbers. and B is less than 100, what is the value of B? 30-21 15. Given thatand8, what is the value of in its lowest terms? 16. Robert had 105 kg of apples and oranges, 20% of the fruits were apples. He bought some more apples and the percentage of apples increased to 30%. How many kilograms of apples did he buy? 17. A boy in a class noted that the ratio of the number of boys (excluding himself) to the number of girls is 3: 2. A girl from the same class noted that the ratio of the number of girls (excluding herself) to the number of boys is 3:5. How many pupils are there in the class altogether? 18. The figure below shows my watch at the time I met my friend. Reading the time on my watch, I had thoughtI washour late but my watch turned out to be 5 minutes fast. If my friend had 6 arrived 12 minutes before the time we were supposed to meet, how long would my friend have waited for me? 11 12 1 10

Answer 1

Now, 8 times 8 = 64 4 times 4 times 4 = 64 therefore A = 8 B = 64 C = 4 therefore the required value of B is 64 now, 3 delta - 21 /3 = 8 or 3 delta - 21 = 24 or 3 delta = 45 or delta = 15 therefore 4 + delta /8 = 15 - 5 /5 or 4 + delta /8 = 2 or 4 + delta = 16 or delta = 12 therefore delta /delta = 12/15 = 4/5 robert had 105 time 20/100 kg - 21 kg of apples let he bought x kg more apples. Then by the given condition, (105 + x) times 30/100 = 21 + x or 3(105 + x) = 210x + 10x or 315 + 3x = 210 + 10x or 7x = 105 or x = 105