Question

Mathematics 1
Arithmetic
The sum of HCF and LCM of two numbers is 435. LCM is 28 times the HCF.
If one of the numbers is 60, find the other number.
Four bells begin tolling together and toll at interval of 2,6,10,14 seconds
respectively. After how many seconds will they toll together?
3. Two numbers are respectively 20% and 40% more than a third number. What
is the ratio of two numbers?
4 the price of an article is reduced by 20%, by what percent the consumption
he increased to keep the expenditure unaltered?
5. A tution class sent 120 candidates for examination. The result was 80%. How
many candidates should be detained to get 96% result?
6. In an examination, a candidate who secures 25% marks fails by 60 marks,
while another candidate who secures 42% marks, gets 8 marks more than
peressary for passing. What are the maximum marks and the percentage
necessary for passing (NDA 1973)
ZA mixture of 70 litres of milk and water contains 10% of water. How much
water must be added to make water 12_%?
8. What will be the rate of simple interest if a certain sum of money increase
by 60% in 5 years?
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Answer 1

Product of two numbers = HCF multiply LCM
One no. Multiply another no.= HCF MULTIPLY 28
435 = HCF multiply 28
HCF = 435 divide 28
HCF =