Sujoy Kumar Datta

The number of terms which are common in the two series 17 , 21 , 25 , … , 417 and 16 , 21 , 26 , … , 466 is

It takes five workers 10 hours to build a new server for a computer, with each working at the same rate. If five workers start to build the server at 11am, and one technician is added per hour starting at 3pm, at what time will the server be completed?

A contractor initially assigned a group of men a job to be done in 8 days. However, due to other commitments, 10 men were withdrawn at the end of each day. The job was completed in 12 days. How many men were initially assigned?

Three classmates, returning from a mall, stopped to have dinner at a restaurant. After eating, they were given a bowl of refreshing mints. Sita took 1/3 of the mints, but returned four because she started feeling bad for taking so many. Zarina then took one-fourth of what was left but returned three for a similar reason. Anna then took half of the remaining mints but kept two back in the bowl. The bowl had 17 mints left after this. How many mints did the bowl originally have?

A shop sells four types of rice A, B, C and D having cost price Rs 40/kg, Rs 55/kg, Rs 50/kg and Rs 65/kg respectively. Amit purchased a kg of A and b kg of B to make (a + b) kg of a new type of rice E worth Rs 50/kg. Then he purchased c kg of C and d kg of D to make (c + d) kg of a new type F of rice worth Rs 60/kg. Finally he took x kg of rice and y kg of rice from E quality of rice and F quality of rice respectively to make (x + y) kg of rice worth Rs 53/kg. If a, b, c, d, x & y are all integers then the minimum value of a+b+c+d+x+y in kg is

There are five boxes of different but unknown weights. Each box weighs less than 10 kg. If the boxes are weighed in pairs, the weights obtained are 11, 11.2, 11.3, 11.4, 11.5, 11.6, 11.7, 11.8, 12 and 12.1 kg. The heaviest box will weigh

The sum of the ages of the members of a family of 7 people was 232 years, 10 years ago. Three years later, a family member died when he was 60 years old and a baby was born in the same year. After another 3 years, one more family member died, again aged 60, and a baby was born in the same year. The present average age of this 7-member family is

During an event to raise funds for the poor, a number of volunteers donated some amount apart from all the members of the event organising committee. The organising committee members made an average contribution of Rs 1,100 and this sum was 88% of the total amount raised. The members in the organising committee were 60% more than the number of volunteers. The average contribution made by the volunteers, in Rs, is