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the sum of first 4 terms of an ap is 28 and sum of first 8 terms is 88, find sum of 16 terms

Q.1   The students of a school stand in a rectangle for an assembly. Each row had 8 boys and each column had 10 girls. There were 16 empty spaces in the rectangle. What is the number of possible values for the total number of students in the school?

Q 2 A school allows either all white uniform or a combination uniform where one of the trouser or shirt is black and the other is white. In all there are 15 combination uniforms, 12 white trousers and 13 white shirts. What is the total number of students in the school?

Five horses, Red, White, Grey, Black and Spotted participated in a race. As per the rules of the race, the persons betting on the winning horse get four times the bet amount and those betting on the horse that came in second get thrice the bet amount. Moreover, the bet amount is returned to those betting on the horse that came in third, and the rest lose the bet amount. Raju bets Rs. 3000, Rs. 2000 and Rs. 1000 on Red, White and Black horses respectively and ends up with no profit and no loss.Five horses, Red, White, Grey, Black and Spotted participated in a race. As per the rules of the race, the persons betting on the winning horse get four times the bet amount and those betting on the horse that came in second get thrice the bet amount. Moreover, the bet amount is returned to those betting on the horse that came in third, and the rest lose the bet amount. Raju bets Rs. 3000, Rs. 2000 and Rs. 1000 on Red, White and Black horses respectively and ends up with no profit and no loss.


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What is the difference between SSC and RALWAYS Exams ?

Which was the first Country to have a National Flag ?

Find the number of real values of ‘k’ which satisfy the equation 5{k} + 4k = 6[k] + 3, where [k] is the greatest integer less than or equal to k and {k} is the fractional part of k.

Please explain me the answer

1

Can anyone please explain equation 1. How is Area of Triangle OQR being determined from OQ and NR?

sir

The college auditorium is to be painted. But due to lack of funds it couldn’t be done. So a sincere student took the initiative and decided to paint the audi. Seeing his enthusiasm other students joined him. He is the only person doing the job on the first day. On the second day 2 more boys join him. On the third day 3 more boys join the group of the previous day and so on.....In this manner, the job is finished in exactly 25 days. How many days would 15 workers take to do the same job, given that one man is twice as efficient as a boy.