Download App

Number systems — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsNumber systems1 Mark
MCQ
If $\sqrt{7}=2.646$ then $\frac{1}{\sqrt{7}}=?$
  • A
    0.375
  • B
    0.378
  • C
    0.441
  • D
    None of these.
✓

Answer

  1. 0.378
    Solution:
    $\frac{1}{\sqrt{7}}=\frac{1}{\sqrt{7}}\times\frac{\sqrt{7}}{\sqrt{7}}$
    $=\frac{\sqrt{7}}{7}$
    $=\frac{1}{7}\times\sqrt{7}$
    $=\frac{1}{7}\times2.646$
    $=0.378$
    Hence, the correct option is (b).

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q" from Number systems→Number systems — all question types→Maths STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Write the correct answer in the following:
Decimal representation of a rational number cannot be.
→
The statement that 'the lines are parallel if they do not intersect' is in the form of:
  1. A definition.
  2. An axiom.
  3. A postulate.
  4. A theorem.
→
The angles of a quadrilateral are in the ratio 3 : 4 : 5 : 6. The smallest of these angles is:
  1. 45°
  2. 60°
  3. 36°
  4. 48°
→
If one angle of a parallelogram is 24° less than twice the smallest angle, then the largest angle of the parallelogram is:
→
Which of the following is an irrational number?
→
The mean of 25 observations is 36. Out of these observations if the mean of first 13 observations is 32 and that of the last 13 observations is 40, the 13th observation is:
→
The number of lines passing through one point.
→
The volume of the cuboid whose length, breadth, and height is 12cm, 8cm and 6cm is:
→
The diagonal of a rhombus are 24cm and 10cm. Then its perimeter is:
→
If $x=\frac{\sqrt{3}-\sqrt{2}}{\sqrt{3}+\sqrt{2}}$ and $y=\frac{\sqrt{3}+\sqrt{2}}{\sqrt{3}-\sqrt{2}}$, then $x^2+x y+y^2=$
→