Which of the following statements is incorrect?
A For natural numbers a and b, if a divides b2 then a divides b.
B For any natural number is irrational.
C Product of distinct prime numbers is always equal to their L.C.M.
D For any natural number n, 6n never ends with digit zero.
the answer is given wrong . The correct answer should be B
In the given figure (not drawn to scale), O is the centre of the circle. Find the value of x.
please specify whether CD is a straight or not. if it is a straight line then the figure is not correct. the being that triangle BOD is congruent to triangle BOC by SSS congruency. so by CPCT angle BOD and angle BOC is of 72 degrees. which doesn't satisfy that CD is straight line. as the sum of angles is 144 degrees not 180 degrees
Which of the following statements is INCORRECT?
AThe area of a rectangular children park is 396 m2. It is 18 m wide. If the cost of fencing the park by wire is ₹ 75 per metre, then the total cost of fencing is ₹ 6000.
BA square and a rectangle have the same area of 81 cm2. The length of the rectangle, if the breadth of the rectangle is one-third of the side of the square is 27 cm.
CIf 1 cm is equal to 10 mm, then 100 square mm are there in 1 sq. cm.
DPawan walks twice around a rectangular field with length 30 m and breadth 25 m. If Neha walks thrice around a square field of side 40 m, then Pawan covers more distance by 260 m.