1166: India's contribution to Mathematics includes:
1. Number system
2. Decimal system
3. Concept of zero
(a) 1, 2 & 3
(b) 1 & 2
(c) 2 & 3
(d) 1 & 3
1167: A married couple adopted a male child. A few years later twin boys were born to them. The blood group of the couple is 'AB' positive and 'O' negative. The blood group of the three sons is A positive, B positive, and 'O' positive. The blood group of the adopted son is
(a) A positive
(b) B positive
(c) O positive
(d) Cannot be determined
1168: Which among the following has the largest perimeter?
(a) A square with an area of 25 sq cm
(b) An equilateral triangle with side 5 cm
(c) A circle with diameter 4 cm
(d) A rectangle with area 84 sq cm and one side 12 cm
1169: Recently, there has been a concern over the short supply of a group of elements called 'rare earth metals'. Why?
1. China, which is the largest producer of these elements, has imposed some restrictions on their export.
2. Other than China, Australia, Canada and Chile, these elements are not found in any country.
3. Rare earth metals are essential for the manufacture of various kinds of electronic items and there is a growing demand for these elements.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
1170: For which one of the following items, is Tirupur well known as a huge exporter to many part of the world?
(a) Handicrafts
(b) Knitted garments
(c) Leather goods
(d) Gems and Jwellery