Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 342 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
2. 2.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Diya bought 6 notebooks and a water bottle for ₹310 in all. Each notebook cost the same. What did one notebook cost? (a) ₹304 (b) ₹310 (c) ₹51 (d) not enough info
4. 4.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
5. 5.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a rumour (d) a loud opinion
6. 6.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Saanvi is 8 years old. Rohan is older than Saanvi. How old is Rohan? (a) 10 (b) 9 (c) not enough info (d) 13
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Arjun is 9 years old. Meera is older than Arjun. How old is Meera? (a) 10 (b) 11 (c) not enough info (d) 14
10. 10.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no mango is sweet (c) no, check more (d) yes, it is certain
11. 11.🧩 Ishaan is 8 years old. Rohan is 6 years older than Ishaan. How old is Rohan? (a) 15 (b) not enough info (c) 14 (d) 6
12. 12.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) for fun only (d) to change answers
13. 13.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) not enough info (b) 14 (c) 70 (d) 7
14. 14.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) 10 (b) not enough info (c) 21 (d) 28
15. 15.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Ishaan bought 4 notebooks and a water bottle for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹80 (c) ₹20 (d) ₹76
17. 17.🧩 Rohan is 6 years old. Meera is 2 years older than Rohan. How old is Meera? (a) 9 (b) 2 (c) not enough info (d) 8
18. 18.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Tara bought 2 balls and a water bottle for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹130 (b) not enough info (c) ₹128 (d) ₹65
20. 20.🧩 Kabir is 7 years old. Saanvi is 7 years older than Kabir. How old is Saanvi? (a) 15 (b) 14 (c) not enough info (d) 7
21. 21.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 4 PM (d) 6 PM
22. 22.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
23. 23.🧩 A box has 3 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 20 (b) 8 (c) not enough info (d) 15
24. 24.🧩 Diya bought 2 notebooks for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹40 (c) ₹70 (d) ₹35
25. 25.🧩 A box has 8 rows of apples, with 6 in each row. How many apples are in the box? (a) 48 (b) not enough info (c) 54 (d) 14
26. 26.🧩 A box has 7 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 35 (b) 40 (c) 12 (d) not enough info
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
28. 28.🧩 A box has 5 rows of apples, with 6 in each row. How many apples are in the box? (a) 36 (b) 30 (c) 11 (d) not enough info
29. 29.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
30. 30.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
31. 31.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 90 (b) not enough info (c) 9 (d) 18
32. 32.🧩 Vihaan is 10 years old. Rohan is older than Vihaan. How old is Rohan? (a) not enough info (b) 15 (c) 11 (d) 12
33. 33.🧩 Vihaan is 10 years old. Tara is 2 years older than Vihaan. How old is Tara? (a) 2 (b) 13 (c) not enough info (d) 12
34. 34.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 4 (b) not enough info (c) 40 (d) 8
35. 35.🧩 Kabir is 11 years old. Ananya is 6 years older than Kabir. How old is Ananya? (a) 18 (b) 6 (c) 17 (d) not enough info
36. 36.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
37. 37.🧩 Meera is 10 years old. Rohan is 2 years older than Meera. How old is Rohan? (a) 12 (b) 13 (c) not enough info (d) 2
38. 38.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
39. 39.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
40. 40.🧩 Tara bought 4 pens and a cap for ₹200 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹50 (c) ₹196 (d) ₹200

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