Question
Write five numbers which you cannot decide whether they are square just by looking at the unit's digit.
✓
Answer
A number whose unit digit is $2, 3, 7$ or $8$ cannot be a perfect square.
On the other hand, a number whose unit digit is $1, 4, 5, 6, 9$ or $0$ might be a perfect square although we have to verify that. Applying these two conditions,
we cannot determine whether the following numbers are squares just by looking at their unit digits, $1111, 1001, 1555, 1666$ and $1999$
On the other hand, a number whose unit digit is $1, 4, 5, 6, 9$ or $0$ might be a perfect square although we have to verify that. Applying these two conditions,
we cannot determine whether the following numbers are squares just by looking at their unit digits, $1111, 1001, 1555, 1666$ and $1999$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The dimensions of a rectangular water tank are $2\ m$ $75\ cm$ by $1\ m$ $80\ cm$ by $1\ m$ $40\ cm$. How many litres of water does it hold when filled to the brim?
→Write the Pythagorean triplet whose smallest number is 18.
If PAIR and RODS are two rectangles, find $\angle I O D$.
→Find the product.
$\left(\frac{2}{3} x y\right) \times\left(\frac{-9}{10} x^2 y^2\right)$
→$\left(\frac{2}{3} x y\right) \times\left(\frac{-9}{10} x^2 y^2\right)$
Rohit deposited Rs. $8000$ with a finance company for $3$ years at an interest of $15\%$ per annum. What is the compound interest that Rohit gets after $3$ years?
→If $\frac{3}{5}$ of a number exceeds its $\frac{2}{7}$ by $44,$ find the number.
→Roma borrowed Rs. $64000$ from a bank for $1\frac{1}{2}$ years at the rate of $10\%$ per annum. Compute the total compound interest payable by Roma after $1\frac{1}{2}$ years, if the interest is compounded half-yearly.
→Rashmi has a road map with a scale of 1 cm representing 18 km . She drives on a road for 72 km . What would be her distance covered In the map?
In how many years will $Rs. 6250$ amount to $Rs. 7290$ at $8\%$ per annum, compounded annually$?$
→A $5.5\ m$ long ladder is leaned against a wall. The ladder reaches the wall to a height of $4.4\ m$. Find the distance between the wall and the foot of the ladder.
→