Form 2 Mathematics
Express 1728 and 2025 in terms of their prime factors. Hence evaluate:
answer
 Form 1 Mathematics
A two digit number is such that, the sum of its digits is 13. When the digits are interchanged, the original number is increased by 9. Find the original number.
answer
Form 1 Mathematics
(a) Evaluate 540396-726450÷3.
(b) Write the total value of the digit in the thousands place of the results obtained in (a) above.
ANSWERS
Form 1 Mathematics
Ntutu had cows, sheep and goats in his farm the number of cows was 32 and number of sheep was twelve times the number of cows. The number of goats was 1344 more
than the number of sheep. If he sold 3/4 of the goats, find the number of goats that remained.
ANSWER
Form 1 Mathematics
Answer
Form 1 Mathematics
A number m is formed by writing all the prime numbers between 0 and 10 in an ascending order. Another number n is formed by writing all the square numbers between 0 and 10 in a descending order:
a) Find m – n; b) Express (m – n) as a product of its prime factors.
answer
Form 1 Mathematics
(a) Express 10500 in terms of its prime factors.
(b) Determine the smallest positive number P such that 10500P is a perfect cube.
answer
Form 1 Mathematics
The figure below is a net of a cube with some dots on two faces.
Given that the number of dots on pairs of opposite faces add up to 7, fill in appropriate dots in each of the empty faces.
answer
Form 1 Mathematics
The sum of two numbers x and y is 40. write down an expression, in terms of x, for the sum of the squares of the two numbers.
Hence determine the minimum value of x2 + y2
answer
Form 1 Mathematics
All prime numbers less than ten are arranged in descending order to form a
Number. (a) Write down the number formed (b) State the total value of the second digit in the number formed in (a) above
answers
 Mary has 21 coins whose total value is Kshs 72. There are twice as many five shillings coins as there are ten shillings coins. The rest are one shillings coin. Find the number of ten shillings coins that Mary has.KNEC ANSWER
A fruiterer bought 144 pineapples at Kshs 100 for every six pineapples. She sold some of them at Kshs. 72 for every three and the rest at Kshs 60 for every two. If she made a 65% profit, calculate the number of pineapples sold at Kshs 72 for every three ( 3 marks)MARKING SCHEME
Simplify:
MARKING SCHEME
​[3 MARKS] 3 MARKS Without using logarithms tables evaluate
MARKING SCHEME
3 MARKS
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