Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 56 · 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.🧩 Ananya bought 4 balls for ₹160 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹45 (c) ₹40 (d) ₹160
2. 2.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
3. 3.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 12 (b) 6 (c) not enough info (d) 60
4. 4.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Ishaan is 6 years old. Ananya is older than Ishaan. How old is Ananya? (a) 8 (b) 11 (c) not enough info (d) 7
6. 6.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
10. 10.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Diya bought 6 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹300 (b) ₹55 (c) not enough info (d) ₹50
12. 12.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
13. 13.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, mangoes match (c) no mango is sweet (d) yes, it is certain
14. 14.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
15. 15.🧩 Ishaan is 10 years old. Meera is 4 years older than Ishaan. How old is Meera? (a) 4 (b) 14 (c) not enough info (d) 15
16. 16.🧩 Ishaan bought 4 kites for ₹240 in all. Each kite cost the same. What did one kite cost? (a) ₹240 (b) ₹65 (c) ₹60 (d) not enough info
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
18. 18.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
19. 19.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 7 PM
20. 20.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
21. 21.🧩 Ishaan bought 6 mangoes and a bag for ₹200 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹200 (c) ₹33 (d) ₹194
22. 22.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
23. 23.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
24. 24.🧩 A box has 3 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 32 (b) 11 (c) not enough info (d) 24
25. 25.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 5 PM
26. 26.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
28. 28.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
29. 29.🧩 Kabir bought 3 kites for ₹135 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) ₹135 (c) ₹45 (d) not enough info
30. 30.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
31. 31.🧩 A box has 3 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 36 (c) 12 (d) 27
32. 32.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
33. 33.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
34. 34.🧩 Vihaan is 8 years old. Arjun is older than Vihaan. How old is Arjun? (a) 9 (b) 13 (c) 10 (d) not enough info
35. 35.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
36. 36.🧩 Saanvi bought 6 kites and a bag for ₹280 in all. Each kite cost the same. What did one kite cost? (a) ₹274 (b) ₹280 (c) not enough info (d) ₹46
37. 37.🧩 Meera is 6 years old. Kabir is older than Meera. How old is Kabir? (a) 7 (b) 11 (c) not enough info (d) 8
38. 38.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Rohan bought 3 mangoes and a lunch box for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹110 (b) not enough info (c) ₹107 (d) ₹36
40. 40.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False

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