Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 220 · 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.🧩 Nisha is 9 years old. Ishaan is 4 years older than Nisha. How old is Ishaan? (a) 4 (b) 14 (c) not enough info (d) 13
2. 2.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
3. 3.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
4. 4.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
5. 5.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
6. 6.🧩 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
7. 7.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
8. 8.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
10. 10.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
11. 11.🧩 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
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Diya bought 2 markers and a bag for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹58 (c) ₹30 (d) not enough info
14. 14.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) 10 (c) 5 (d) not enough info
15. 15.🧩 Meera is 7 years old. Saanvi is 4 years older than Meera. How old is Saanvi? (a) not enough info (b) 4 (c) 12 (d) 11
16. 16.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) not enough info (c) 70 (d) 14
17. 17.🧩 Vihaan bought 2 notebooks and a cap for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹98 (b) not enough info (c) ₹100 (d) ₹50
18. 18.🧩 Nisha is 10 years old. Saanvi is older than Nisha. How old is Saanvi? (a) 11 (b) 15 (c) 12 (d) not enough info
19. 19.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) yes, mangoes match (d) no mango is sweet
20. 20.🧩 Kabir bought 3 pens and a lunch box for ₹95 in all. Each pen cost the same. What did one pen cost? (a) ₹92 (b) ₹95 (c) not enough info (d) ₹31
21. 21.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
22. 22.🧩 Aarav bought 4 notebooks for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) ₹140 (c) not enough info (d) ₹40
23. 23.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 40 (c) 8 (d) not enough info
24. 24.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
25. 25.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
26. 26.🧩 A box has 7 rows of oranges, with 6 in each row. How many oranges are in the box? (a) not enough info (b) 42 (c) 48 (d) 13
27. 27.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 5 PM
28. 28.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
29. 29.🧩 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
30. 30.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
32. 32.🧩 Ananya bought 5 pens for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹100 (b) ₹25 (c) ₹20 (d) not enough info
33. 33.🧩 Ananya is 6 years old. Ishaan is 4 years older than Ananya. How old is Ishaan? (a) not enough info (b) 10 (c) 4 (d) 11
34. 34.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 5 PM
35. 35.🧩 Arjun is 6 years old. Nisha is 4 years older than Arjun. How old is Nisha? (a) 10 (b) 4 (c) not enough info (d) 11
36. 36.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
37. 37.🧩 Diya bought 6 kites for ₹330 in all. Each kite cost the same. What did one kite cost? (a) ₹330 (b) ₹55 (c) ₹60 (d) not enough info
38. 38.🧩 Saanvi is 6 years old. Diya is older than Saanvi. How old is Diya? (a) 8 (b) not enough info (c) 11 (d) 7
39. 39.🧩 Diya is 8 years old. Nisha is 8 years older than Diya. How old is Nisha? (a) 17 (b) 16 (c) 8 (d) not enough info
40. 40.🧩 Saanvi bought 4 markers and a cap for ₹200 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) not enough info (c) ₹196 (d) ₹200

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